Automatic aquarium feeder



FIG. 1 is a top plan view of an automatic aquarium feeder showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof, the left side being substantially similar in appearance; and

FIG. 5 is a rear elevational view thereof.

The broken-line showing of a portion of a power cord is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an automatic aquarium feeder, as shown and described. 